Z-Score Calculator

Calculate z-scores, probabilities and raw values in any direction, with the region shaded on a normal distribution curve.

Parameters

Region

Above

Below

Between

and

Outside

and

Area (probability)

0.7745

Percentage

77.45%

z range

-1.000 to 1.500

The curve is the result — shaded area is the probability

z = (x − μ) ÷ σ · P(-1.00 < Z < 1.50) = Φ(1.50) − Φ(-1.00) = 0.9332 − 0.1587 = 0.7745